package offer;

import java.util.Scanner;

/**
 * <p>
 * 剑指 Offer 05. 替换空格
 * </p>
 *
 * @author xiaoboom
 * @date 2021/9/24 23:22
 */
public class Offer05 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        System.out.println(replaceSpace(s));
    }

    public static String replaceSpace(String s) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            if (c == ' ') {
                sb.append("%20");
            } else {
                sb.append(c);
            }
        }
        return sb.toString();
    }
}
